Pipe-joint.



PATB'NTED APR. 2e, i904.-

I W. M. RAPP. PIPE JOINT APPLICATION FILED OUT. 31, 1901.

NITED rains Patented April 26,- 1904.

ATENT rrion.

PIPE-UOlNT.

SPECIFICATION forming part of Letters Patent No. 758,278, dated April 26, 1904. Applicationifiled October 31, 1901. Serial No 80,596. (Ni) model.) i

To all whom it may concern:

Be it known that L /VILLIAM M. Barr, a citi- Zen of the United States, residing at Atlanta, county of Fulton, and State of GeorgiuJhave invented certain new and useful Improvements in Pipe-Joints, fully described and represented in the following specification and the accompanying drawings, forming a part of the same. v

{O This invention relates to pipe-joints, the improvements of the present invention having reference particularly to pipe-joints of that class in which the end of one of the two members to be joined, consisting of two pipes or a r pipe and plug, is inserted in the end (usually bell-shaped) of the other member, the space between the two-overlapping ends being then suitably packed to form a tight joint.

The object of the present invention is to pro vide a joint of this character wherebya tight and firm closure between the ends of the pipes or the pipe and plug may be effected and whereby also the member which is inserted in the end of the other member may be readily withdrawn when desired for the purpose of permitting repairs or inspection and may be as readily returned to position after such repairs or inspection without affecting in any way the firmness or tightness of the joint between the two members.

The improvements of the present invention are of particular ad vantage Where it is desired to form joints between or plug the ends of pipes under water.

' The invention also relates to a peculiar construction of plug used for plugging the end of a pipe or fitting and designed to be secured therein according to the present invention.

As a full understanding of the invention can 4 best be had by a detailed description of an organization embodying the same, such description will now be given, reference being had tothe accompanying drawings fin which- Figure 1 is a longitudinal sectional elevation of a. pipe with a plug in theend thereof ready for the formation of the joint between it and the pipe. Fig. 2 a similar view showing the joint formed bu; ween the plug and pipe. Fig. 3 is a view corresponding to Fig. 5 2, but with the plug withdrawn. Fig. 4: is a perspective View of the plug. Fig. 5 is a viewsimilar to Fig. 2, illustratingthe present in vention applied to the meeting ends of two adjacent pipes or sections of piping Referring to Figs. 1 to 4 of the drawings, A represents an ordinary water or other pipe or fitting provided with the usual bell-shaped end B for the receptionof a plug 0 for closing the end of said pipe or for the reception of another pipe or section of piping. (See 0 Fig. 5.) The plug C is screw-threaded, as shown, the thread thereon tapering toward the inner end of the plug for a purpose to be hereinafter explained. 'In plugging the end of the pipe A with the plug-C the latter is 5 first inserted in the bell-shaped end B of the pipe, as shown in Fig. 1, molten lead or other suitable material being then poured into the space; between the inner face of. said bell-- shaped end B and the plug (3, so as to forms. 79

filling or packing D molded into the space between the plug 0 and bell B and-about the screw-thread upon said plug and. which keys into arecess b in the end of the pipe. The lead or other suitable filling material being then allowed tocool and then calked, because of shrinkage as it cools-will form a. firm and tight joint between theplug and the pipe, efiecting a perfect closure or plugging of, the latter. As the fillingD is introduced between the plug and pipe the thread on the .former will. become embedded therein, thus .secnrelylocking the plug against displace ment or ejection from the pipe by the pressure within the latter. By the provision of $5 the thread upon the plug, however, and the employment of a soft-metal packing, suchas lead or other suitable soft metal, the joint formed is such as will permit of. the ready re- -moval of the plugwhen desired by simply 9 turning the plug and its equally readyreturn to the pipe without disturbing the packing or otherwise aficcting the tightness of the joint between the plug and pipe. As the plug is turned to remove it from the pipe the thread thereon will mbve through the packing, leaving a female screw-thread therein, as shown in Fig. 3, ready for its reception units-return to the pipe. The thread upon theplug' tapers toward the inner end thereof, as with such a thread the plug can be more readily removed, and, moreover. upon the return of. the pluga wedging action is secured between the thread thereon and that in the packing, insuring a tightjoint between the two. For convenience in turning the plug is, as shown, provided with a number of projections E, adapted for engagement by a suitable wrench or turningkey. I

The present invention has been designed with especial reference to joints formed between a pipe" and a plug in the end thereof; but it is equally applicable to joints between the ends of two pipes or sections of piping. Such a construction is shown in Fig. 5, wherein A C represent two pipes, with the latter inserted in the end of the former and thejoint formed between the two, as just described in connection with the plug of Figs. l'to 4.

What 1 claim is i 1. The combination ofa pipe, a member provided on its end with an exterior screw-- thread which tapers inwardly, and apacking of lead or other suitable material molded between said pipe and member and about the screw-thread upon the latter, substantially as described.

2. The combination of a pipe, a plug in the end the; eof provided. with an exterior screwthread which tapers inwardly, and a packing of lead or other suitable material molded between said pipe and and about the-screwthread upon the latter, substantially as described.

3. The combinatioii' of a pipe, amember provided on its end with an exterior screwthread which tapers inwardly, and a packing "of lead or other suitable material molded between said pipe and member and about the screw-thread upon the latter, said pipe being 4.' The combination of a pipe, aplug in the end thereof provided with an exterior screwthread which tapers inwardly, and a packing of lead or other suitable material molded between said pipe and plug and about the screwthreadupon the latter, said pipe being pr0 provided with a recess B into which said pack-- ,ing keys, substantially as described.

vided with a recessB into which said packing keys, substantially as described.

- 5. A plug, as C, provided with an exterior screw-thread which tapers inwardly, substantially as described.

-6. A plug, as C, provided with an exterior screw-thread which tapers inwardly, and with means, as E, for engagement by a. wrench or the like, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

Witnesses:

PARK -WooDwABI: 'H. M. LOFLOSS. l 

